 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal.dialogs;

 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.jface.viewers.ViewerSorter;
 import org.eclipse.ui.internal.registry.Category;
 import org.eclipse.ui.internal.registry.ViewRegistry;
 import org.eclipse.ui.internal.registry.ViewRegistryReader;
 import org.eclipse.ui.views.IViewCategory;
 import org.eclipse.ui.views.IViewDescriptor;

 /**
  * This is used to sort views in a ShowViewDialog.
  */
 public class ViewSorter extends ViewerSorter {
     private ViewRegistry viewReg;

     /**
      * ViewSorter constructor comment.
      *
      * @param reg an IViewRegistry
      */
     public ViewSorter(ViewRegistry reg) {
         super();
         viewReg = reg;
     }

     /**
      * Returns a negative, zero, or positive number depending on whether
      * the first element is less than, equal to, or greater than
      * the second element.
      */
     public int compare(Viewer viewer, Object e1, Object e2) {
         if (e1 instanceof IViewDescriptor) {
             String str1 = DialogUtil.removeAccel(((IViewDescriptor) e1)
                     .getLabel());
             String str2 = DialogUtil.removeAccel(((IViewDescriptor) e2)
                     .getLabel());
             return collator.compare(str1, str2);
         } else if (e1 instanceof IViewCategory) {
             IViewCategory generalCategory = viewReg.findCategory(ViewRegistryReader.GENERAL_VIEW_ID);
             if (generalCategory != null){
                 if (((IViewCategory)e1).getId().equals(generalCategory.getId())) {
                     return -1;
                 }
                 if (((IViewCategory)e2).getId().equals(generalCategory.getId())) {
                     return 1;
                 }
             }
             Category miscCategory = viewReg.getMiscCategory();
             if(miscCategory != null){
                 if (((IViewCategory)e1).getId().equals(miscCategory.getId())) {
                     return 1;
                 }
                 if (((IViewCategory)e2).getId().equals(miscCategory.getId())) {
                     return -1;
                 }
             }
             String str1 = DialogUtil.removeAccel(((IViewCategory) e1).getLabel());
             String str2 = DialogUtil.removeAccel(((IViewCategory) e2).getLabel());
             return collator.compare(str1, str2);
         }
         return 0;
     }
 }

